Description:
------------
ArrayObject::getArrayCopy() returns not only public properties of an object, but private and protected properties, too. These last two have strange "inner-style" keys with illegal characters. 

Documentation says that ArrayObject::getArrayCopy() returns array created of public properties: http://www.php.net/~helly/php/ext/spl/classArrayObject.html

Reproduce code:
---------------
class A {
	public $a = 1;
	protected $b = 2;
	private $c = 3;
	
}

$a = new A();
$ao = new ArrayObject($a);
print_R($ao->getArrayCopy());
var_dump((array)$ao);

Expected result:
----------------
Array
(
    [a] => 1
)
array(3) {
  ["a"]=>
  int(1)
}

Actual result:
--------------
Array
(
    [a] => 1
    [< 1 illegal character here>*< 1 illegal character here>b] => 2
    [< 1 illegal character here>A< 1 illegal character here>c] => 3
)
array(3) {
  ["a"]=>
  int(1)
  ["< 1 illegal character here>*< 1 illegal character here>b"]=>
  int(2)
  ["< 1 illegal character here>A< 1 illegal character here>c"]=>
  int(3)
}

literally:

Array
(
    [a] => 1
    [&#65533;*&#65533;b] => 2
    [&#65533;A&#65533;c] => 3
)
array(3) {
  ["a"]=>
  int(1)
  ["&#65533;*&#65533;b"]=>
  int(2)
  ["&#65533;A&#65533;c"]=>
  int(3)
}